2005-2009 Kawasaki Brute Force 650/KVF 650 4x4 Service Manual, Page 76Get this manual
FUEL SYSTEM 3-19 Carburetor
Slip the needle through the hole in the center of the vacuum pistonand put the spring seat [A] on the top of the needleTurn the seat so that it does not block the hole [8] at the bottom of the vacuum piston After installing the upper chamber cover, check that the vacuum piston slides up and down smoothly without binding in the carburetor bore
Fit the projection [A] of the vacuum piston diaphragm in the recess [8] of the body After installing the upper chamber cover, check to make sure that the vacuum piston moves smoothly in the carburetor body
Carburetor Separation
Remove: Carburetor (see Carburetor Removal) Carburetor Joining Bolts [A] and Nuts Separate the carburetors
Carburetor Joining
The center lines of the carburetor bores must be parallel both horizontally and verticallyIf they are not, loosen the carburetor joining bolts and align the carburetors on flat surface Retighten the carburetor joining bolts Visually synchronize the throttle (butterfly) valvesOCheck to see that all throttle valves open and close smoothly without binding when turning the pulleyOVisually check the clearance [A] between the throttle valve and the carburetor bore in each carburetorIf there is difference between two carburetors, turn the balance adjusting screw [8] to obtain the same clearance Install the carburetors (see Carburetor Installation) Adjust the synchronization (see Synchronization Adjustment)